Radon Testing CompaniesCanada — C-NRPP credentials and verification dates

Chatham, ON, Canada

Radon testing in Chatham

Latest credential check on this page: September 14, 2026. Each record carries its own date. Canadian sources and verification.

1 current C-NRPP testing credentials whose official record names Chatham, Ontario. This is partial coverage of professionals with an address in this city, not a list of everyone who serves it.

A C-NRPP certification is not a provincial licence. Confirm the credential and ask whether the professional serves your building before hiring. Check a C-NRPP number.

Name / companyCityC-NRPP credentialServiceValid throughLast verified
Mike Modde
Advanced Basement Systems
ChathamCRT-201502testingJuly 1, 2027September 14, 2026
Fig. 1 — Chatham, approximate. Pin marks the official Canadian Geographical Names Database city reference point, not a business address or service area.

Map source: Natural Resources Canada — Chatham. Contains information licensed under the Open Government Licence – Canada.